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Topic Review (Newest First)

03-22-2010 08:16 PM

64r1

yea the article was pretty informative but i think for me its not a bad deal got it for 500.00 and it has 80,000 miles on it runs great. no smoke no knocking overall i think not bad for $500. Well, later on down the road i will open it up and drop money in it but as for now i have the platform i want to build on. maybe not everyones fav block but i think itll work for me. the only thing that sucks is there is no boss for a mech fuel pump so when i get ready toput it in got to find out how to wire an electric fuel pump in my 64 impala. Anyways thanks for all the info!

03-22-2010 06:33 PM

cobalt327

The Gen 5 (and Gen 6) heads are net lash, 1-pc. rear main seal, the oiling gallery that used to run along the pan rail is gone, no mech. fuel pump, and the heads use a different coolant passage set-up.

It was only around for like 5 years- then they came out w/the Gen 6 w/roller cam, and IIRC revised cooling passages, etc. Some have mech. fuel pump, both the Gen 5 and 6 could be bought as a 502.

EDIT- The article you linked has the run down in much more detail, so you know more than most already!

03-22-2010 05:55 PM

64r1

*differences between the mark lV and the gen V* I am sure someone on here will either give me their opinion though

03-22-2010 05:53 PM

cobalt327

No, I wouldn't call it "bad" news. Maybe "different" news?

The Gen 5 has some differences from the Mark IV and the Gen6 that need to be considered, but over all, it can be made to run like any of them.

I passed on the 427 and found a 454 out of an rv, runs great. Casting number is 12550313 it pulls up as a 91-95 454 4 bolt gen v block. I think i will be happy with as my platform for the future.

Have you had a chance yet to research the Gen 5?

03-22-2010 04:42 PM

64r1

I passed on the 427 and found a 454 out of an rv, runs great. Casting number is 12550313 it pulls up as a 91-95 454 4 bolt gen v block. I think i will be happy with as my platform for the future.

03-15-2010 06:16 AM

cobalt327

Quote:

Originally Posted by techinspector1

Well, it ain't the end of the world. They could still be used in a low-rpm build....

The first 454 I built was w/a set of PP heads.

I ported them and ended up staying w/the stock intake and exhaust, the ports measured to be ~220 cc- after porting, so they're small as cast.

The engine ran very good, actually. The cam I used was a .544 lift w/duration of 238 degrees @ 0.050". Cast iron intake w/Q-jet and 1-3/4" headers.

No idea of the HP or even an estimate from a 1/4 mile trap speed- the engine was barely broken in before it went to a 4-wheeler who had way more $$$ than brains, so I sold it- one of those deals that I just couldn't pass up.

Built a real nice Pontiac engine/tranny/12-bolt rear end for my '81 Camaro from the proceeds.

03-15-2010 12:55 AM

m/w

convert from points to hei on talldeck

Just new on board so here goes the kid is building a boat motor (427 TD ) he has alum heads intake all order& was trying to find a hei to replace the point set up , this is going in a jet boat . Later bake

03-15-2010 12:36 AM

64r1

yea i was hoping for a bigger head but Im not complaining my buddy hooked me up with them so if i dont use them i would give them back. Well, got off the phone with the guy who has the 454 about an hr from me, he broke the tranny from the block while doing so rotated the motor and water came out one of the spark plug holes.Don't know yet how severe but atleast he called to let me know that was stand up thing to do. Anyway if its not too bad maybe i can get the block and bottom end for cheap. still waiting to find my dads friend but other than atleast we arent out of any money

03-14-2010 09:47 PM

techinspector1

Well, it ain't the end of the world. They could still be used in a low-rpm build....this was copied from a Car Craft article....

"GM Iron Peanut Port
This cast-iron head is called the peanut port because the intake ports are not much larger than their namesake. Omar Cabrillo at Coast Motor Supply in Canoga Park, California, helped us out by supplying a pair of the heads complete with tiny stock valves, new guides, and a basic valve job. These peanut ports are roughly 30 percent smaller than an aftermarket 270cc version. There are larger factory oval-port, cast-iron, open-chamber heads at 250 cc, but the only ones we could find had been modified, which would not be representative of an OE head. But don't count these peanut clusters out. If you were looking to build a budget-oriented Rat for towing where power above 4,500 rpm was not a concern, these heads would be an excellent choice with almost 600 lb-ft of torque at 3,200 rpm. If you were to pocket-port these heads and add larger 2.19/1.88-inch valves, you could make 530-plus horsepower. That's not bad for iron castings."

03-14-2010 12:50 AM

cobalt327

Quote:

Originally Posted by 64r1

*14081045 i found it on top of the head

That's better- the extra "7" was throwing things off.

Iím sorry to be the bearer of bad news, but those 045 heads are PP. Can be had for $100-$150.

Probably in the range of 118cc combustion chambers. Should be decent heads to build from.

03-13-2010 10:20 PM

64r1

*14081045 i found it on top of the head in between the valves thats where i got it from don't know the locations but when i punched in the numbers for the heads it came up oval port open chamber 454, it didnt have heavy duty truck or td truck next to it so i assume thats a good sign?

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